"I think those people who are inclined to be responsible are being responsible," Graham said.

"And those few who aren't are probably incorrigible."

Graham says the lower limit would be too much.

"We're a country where there's some states trying to legalize marijuana, we're allowing 15 year olds to get 'Morning After' pills, and now, all of a sudden, they want to crack down on this and make essentially a legal activity illegal," he said.

While designed to keep everyone behind the wheel safe, lowering the legal limit could hit bar owners where it counts: the cash register.

"If it goes any lower, you're going to start seeing businesses being interrupted," Burns said. "That's really getting to the point where someone couldn't go enjoy a glass of wine."

Any change to the limit isn't likely to come soon, but it's certainly something to think about the next time you're out having drinks -- or maybe just one.